Determine C by the Powell equation for a 2 ft by 1 ft rectangular channel, if V — 5.50 ft/sec, e/R = 0.0020, and v = XXXXXXXXXXft 2 /sec. (a) Show a correlation between roughness factor / and...

Determine C by the Powell equation for a 2 ft by 1 ft rectangular channel, if V — 5.50 ft/sec, e/R = 0.0020, and v = 0.00042 ft 2 /sec. (a) Show a correlation between roughness factor / and roughness factor n. (b) What is the average shear stress at the sides and bottom of a rectangular flume 3.66 m wide, flowing 1.22 m deep and laid on a slope of 1.60 m/1000 m?